The synthesis and characterization of phenol-glycol cross-linked polymers are reported. The polymers have high affinity for toxic metal ions such as mercury (II) and can be utilized in methods of analyzing the content of toxic metal ions in a sample and the removal of toxic metal ions from aqueous solutions.

A method for producing a chromatography carrier, including providing a solid phase support, where the solid phase support provided is formed of porous particles on which a ligand has or has not been immobilized, and subjecting the solid phase support to sieve classification. A coefficient of variation of a volume particle size distribution of the porous particles when a ligand has been immobilized is adjusted to 1% to 22%, and a ratio (d1/d50) of volume cumulative 1% particle size d1 to volume cumulative 50% particle size d50 in terms of the porous particles is adjusted to 0.55 to 1.0.

Thin layer chromatography (TEC) devices for the analysis of pico-scale samples, methods for using the devices, and methods for fabricating the devices.

A liquid chromatography packing material employing crosslinked polymer particles, wherein the volume average particle size of the crosslinked polymer particles is at least 2 m but not more than 10 m, the amount of fine particles having a particle size of 1 m or less among the crosslinked polymer particles is less than 1% by volume, and the identity coefficient in the particle size distribution is not more than 1.15.

An absorbent apparatus is provided for an air dryer purge air cleaner. The absorbent apparatus comprises a volume for containing absorbent material. The absorbent apparatus also comprises absorbent material that is both oleophilic and hydrophobic and is packed in the volume to provide a packed bed of absorbent material with a predetermined packing density.

Disclosed is a method for preparing a strontium-82/rubidium-82 generator. The method includes: filling a column volume with a sorbent made of hydrated tin (IV) oxide; passing through the column an initial solution with strontium-82 radionuclide, which also contains ions of stable isotopes of calcium and strontium; and washing out rubidium-82 with a saline solution of 0.9% sodium chloride. In order to achieve a breakthrough of strontium-82 or strontium-85 below permissible levels, 0.01 and 0.1 kBq per 1 MBq .sup.82Rb, respectively, when passing not less than 17 liters of saline solution through columns with a volume of not less than 1.6 cm.sup.3 and a dry sorbent weight of not less than 3.8 g, a specific activity of strontium-82 in the initial solution is not less than 90 GBq (2400 mCi) per mg of stable strontium cations for a generator with an activity of 3700 MBq (100 mCi).

Provided are compositions for removal of a target substance from a fluid stream, the composition comprising a polyamine; and a covalently linked hydrophobic group, wherein the polyamine is covalently linked to a support material. Also provided are processes for removal of a target substance from a fluid stream comprising contacting the fluid stream with a composition comprising a polyamine; and a covalently linked hydrophobic group, wherein the polyamine is covalently linked to a support material.

Provided are compositions for removal of a target substance from a fluid stream, the composition comprising a polyamine; and a covalently linked hydrophobic group, wherein the polyamine is covalently linked to a support material. Also provided are processes for removal of a target substance from a fluid stream comprising contacting the fluid stream with a composition comprising a polyamine; and a covalently linked hydrophobic group, wherein the polyamine is covalently linked to a support material.

Functionalised polymeric chromatography medium, comprising: at least one non-woven sheet comprising one or more polymeric nanofibers having a mean diameter of 10-1000 nm; one or more polymer chains grafted onto the one or more polymeric nanofibers, wherein the polymer chains are poly-glycerol chains comprising glycidol monomer residues or wherein the polymer chains comprise divinylsulfone monomer residues; and at least one ligand group bonded to the one or more polymer chains.

This invention employs columns and methods to apply external and internal standards and compounds. Analytical standard or compounds are adsorbed to a solid phase extraction media and are stored indefinitely. The standards or compounds remain stable on the solid phase extraction media without decomposing. The standards or compounds may be removed from the solid phase extraction media with a solvent.